STUDY ON BEHAVIOUR OF LIGHT WEIGHT CONCRETE BY USING BEAN BALL AS LIGHT WEIGHT AGGREGATE

PROJECT GUIDE : SRI RAMA ROA T A B.E,Mtech, ASST PROF. Department of Civil Engineering, AIT Chikmagalur

Conducted by :

Rajath R TAvinash S A

Jeevan P GowdaBhyranayaka M

INTRODUCTION

Concrete: It is a composite construction material made primarily

with aggregate, cement, and water. There are many formulations of concrete, which provide varied properties. LIGHT WEIGHT CONCRETE:

Lightweight concrete can be defined as a type of concrete which includes an expanding agent in that it increases the volume of the mixture while giving additional quality has lessened the dead weight.

ADVANTAGES OF LIGHTWEIGHT CONCRETE

•Less weight•Resistance to chemicals•Suitable for Structural and non-structural members•Cost is less•Very workable at low w/c ratio•hardening time of fresh concrete is Less than normal concrete

DISADVANTAGES OF LIGHT WEIGHT CONCRETE

• Resistance to chemicals: sensitive to most Petroleum products

• Not suitable to be used as prestressed concrete

• Mix consistency: stable up to 30 minutes after mixing

WHY BEAN BALLS ARE USED IN CONCRETE?

•We can create lightweight concrete to the mix•As very light but strong building component light weight concrete has highly insulting properties and create a stone like surface for creative projects. •Adding the bean balls to the concrete to mainly requires knowing the ratio of the mix.

LITERATURE REVIEW

Conventional concrete made with natural

aggregate originating from hard rock has a high density

lies within the range of 2200 to 2260 kg/m3 and

represents a large proportion of the dead load on a

structure. According to BS: 8110: Part 2: 1985classifies

the lightweight concrete is one with a density of 2000

kg/m3 or less.

OBJECTIVES

To Study the behaviour of hardened concrete property by using

bean balls as an additive

LABORATORY TESTS

1. Specific gravity of coarse aggregate 2. Specific gravity of fine aggregate3. Specific gravity test for cement4. Water absorption test for fine aggregate 5. Water absorption test for coarse aggregate6. Sieve analysis of fine aggregate7. Sieve analysis of coarse aggregate8. Slump test 9. Compression test10. Tensile test

EXPERIMENTAL PROGRAM

1. The test program is planned in accordance to the objective of the experimentation. The grade of concrete adopted was M20.

2. We molded the different proportion of concrete cubes (150mmX150mmX150mm) and cylinders (dia 100mm) of nominal mix proportion of M20 grade and concrete for design

mix proportion (1:1.62: 2.81).

Department of Civil Engineering, AIT.-2013

CONCRETE

cement

Fineness

Setting Time

Specific Gravity Test

Standard Consistency of Cement Paste

fine

Sieve analysis

Specific gravity of fine aggregate

Bulk density of fine aggregate

Coarse

Sieve analysis

Specific gravity

Water absorption test

Bean Balls

SL.NO MATERIAL PROPERTY VALUES

1. Bean balls Cross- SectionSpecific GravityTensile Strength

circularNilNil

2. Cement Normal ConsistencyInitial Setting timeFinal Setting timeCompressive StrengthTensile StrengthCompressive Strength(10% bean balls)Tensile Strength(10% bean balls)

33%55 min355 min18.46 Mpa(7 days)01.88 Mpa (7 days)

21.17Mpa(7 days)

2.34Mpa(7 days)

3. Coarse Aggregate Specific GravityWater Absorption

2.731%

4. Fine Aggregate Specific GravityBulk density

2.544%

FINAL MIX PROPORTION

Final Ratio = 1:1.62: 2.81

Cement

Water

Fine aggregate

Coarse aggregate

Water-cement ratio

413.33 kg/m3

186 kg/m3

646.95 kg/m3

1152.66 kg/m3

0.45

METHODOLOGYCONCRETE

Specimen Preparation

Weighing of Materials

Mixing of Materials

Mould Preparation

Curing of Specimens

AT temperature 27+ 2 C for 24 hours

7 days immersion

28 days immersion

Method of Testing

Compressive strength = p/BD

Tensile strength = 2P/πdl

PREPARATION OF SPECIMEN

Mixing of Bean balls

PREPARATION OF MOULDS

TESTING OF MOULDSMOULD AFTER

COMPRESSION TEST

COMPRESSIVE STRENGTH FOR MORTAR CUBES

3 DAYS% Replacement of fine Agg. by bean

balls

Days WeightIngms

Density gm per M3

Failure load (kN) Compressive Strength (MPa)

Control Mix

3 754 2.2x10-3 41.00 8.36 8.073 747 2.17x10-3 40.00 8.10

3 735 2.14x10-3 38.00 7.75

10%

3 695 2.02x10-3 37.00 7.55 8.053 688 2.0x10-3 42.50 8.60

3 683 1.99 x10-3 39.30 8.02

20%

3 684 1.99 x10-3 38.40 7.83 7.833 685 1.99 x10-3 36.50 7.45

3 687 2.00 x10-3 40.30 8.22

30%

3 681 1.98 x10-3 32.70 6.67 7.103 675 1.96 x10-3 37.40 7.63

3 678 1.97 x10-3 34.20 6.98

COMPRESSIVE STRENGTH FOR MORTAR CUBES

7 DAYS

% replacement of fine agg. by bean balls

Days WtIngms

Density gm per M3

Failure load (kN) Compressive Strength (MPa)

Control Mix

7 783 2.28 x10-3 109.90 22.43 22.467 794 2.31 x10-3 110.70 22.59

7 787 2.29 x10-3 109.60 22.36

10%

7 782 2.27 x10-3 115.30 23.53 22.457 785 2.28 x10-3 104.60 21.34

7 780 2.27 x10-3 110.20 22.49

20%

7 690 2.01 x10-3 85.50 17.44 19.547 680 1.98 x10-3 98.60 20.12

7 696 2.03 x10-3 103.20 21.06

30%

7 771 2.24 x10-3 87.40 17.83 17.677 768 2.24 x10-3 92.80 18.94

7 773 2.25 x10-3 79.60 16.24

COMPRESSIVE STRENGTH FOR MORTAR CUBES

28 DAYS% replacement of fine

agg. by bean ballsDays Wt

Ingms

Density gm per M3

Failure load (kN) Compressive Strength (MPa)

Control Mix

28 802 2.33x10-3 135.00 27.55 28.29

28 798 2.31 x10-3 138.50 28.26

28 796 2.32 x10-3 142.50 29.08

10%

28 795 2.31 x10-3 133.50 27.24 28.00

28 793 2.31 x10-3 137.60 28.08

28 791 2.30 x10-3 141.10 28.70

20%

28 794 2.31 x10-3 133.20 27.18 26.72

28 792 2.30 x10-3 129.30 26.38

28 793 2.31 x10-3 131.80 26.60

30%

28 789 2.30 x10-3 125.70 25.62 26.30

28 790 2.30 x10-3 130.30 26.60

28 791 2.30 x10-3 132.00 26.90

RESULT AND DISCUSSIONCOMPRESSIVE STRENGTH

3 DAYS

.

Percentage of Bean balls

used

Wt In gms

Density gm per M3

Dimension of specimen (mm)

Cross sectional

area (mm)

Crushing load (kN)

Compressive strength for 3th

days(N/mm2)

10 7890

2.33 x 10-3 150 150 150 22500 182.408.10

210 7896

2.33 x 10-3 150 150 150 22500 171.207.60

320 7785

2.31 x 10-3 150 150 150 22500 179.407.97

430 7776

2.304 x 10-3 150 150 150 22500 182.608.11

COMPRESSIVE STRENGTH FOR 3 DAYS

SPLIT TENSILE STRENGTH

7 DAYS

Sl.No.

% of Bean balls used

WtIngms

Density gm per M3

Dimension of specimen (mm)

Cross sectional area

(mm)

Crushing load (kN)

Compressive strength for

7th days( N/mm2 )

10 7970

2.36 x10-3 150 150 150 22500 415.3318.46

210 7910

2.34 x10-3 150 150 150 22500 490.0021.17

320 7820

2.32 x10-3 150 150 150 22500 505.8622.48

430 7710

2.3 x10-3 150 150 150 22500 452.5020.11

SPLIT TENSILE STRENGTH FOR 7 DAYS

SUGGESTIONS FOR FUTURE WORK

THE PRESENT RESEARCH CAN BE EXTENDED TO

•By adopting the same method for different grades of concrete.•By the use of different admixtures to get improved strength.•By adopting the same method for different lightweight aggregate.•By adopting the same method for different binding materials like Fly ash, Silica fume, Rice Husk ash etc…

CONCLUSION

• It was observed that density of concrete decreased in turn reduces weight of the structure.

• As bean balls are not rigid, the compressive strength / tensile strength reduced by increased percentage of addition of additive.

Department of Civil Engineering, AIT.-2014

REFERENCES

•Concrete admixtures hand book, properties, Science and technology second

edition by V.S. Ramachandra.

•Concrete Technology – M.L. Gambhir

•Concrete Technology – M.S. Shetty

•Concrete Manufactures, Properties and Materials – p. Kumar Mehta And Paula

J.M.Monterio

•Handbook of Ultratech RMC Ltd, Mysore.

•www.civilengineering.com/mixdesignforconcrete.

•www.aboutcivil.com/propertiesofconcrete

•Indian concrete journal Sep.2010.Department of Civil Engineering, AIT.-2014

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